I found CloudApp to be simple and useful. I was impressed by the level of support and the speed of response when I had any question about the app. It is easy to use and has a great set of features. My biggest concern is the lack of data security. I would suggest setting up an account before allowing anyone else access to the information stored in your CloudApp account. I think CloudApp should allow users to share more info than just email addresses (like phone numbers). They could even let users upload images/documents as well as add videos to documents. This way you wouldn't only be sharing contacts but other things too!